UDL(4)

💅 UDL(4) — the display driver that ate 💅

okay so bestie, gather round, because this one is literally the udl man page from the Kernel Interfaces Manual and it's giving "vintage USB display tech, but make it iconic." It's section 4, so it's a device driver page, and honestly? It's short. You'll be fine. 🫶

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✨ NAME ✨

udl — the DisplayLink DL-120 / DL-160 USB display device driver. Yes, that's the whole name. A little guy. A little USB-to-screen guy. 🎀

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🌸 SYNOPSIS 🌸

So there's two ways to get this driver living in your system, and the man page is very specific about it, so let's not freestyle.

Option A — bake it into the kernel. Put these exact lines in your kernel configuration file:

device udl
device videomode

Like, both of them. videomode is not optional, bestie, it's part of the vibe. 💜

Option B — load it as a module at boot time. Then you just drop this line into loader.conf(5):

udl_load="YES"

That's it. That's the whole synopsis. Slay. ✨

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🦋 HARDWARE 🦋

The udl driver supports USB display devices based on the DisplayLink DL-120 and DL-160 graphic chips. Here's the full guest list — no cap, this is every single one:

• Century Corp. Japan Plus One LCD-8000U
• Century Corp. Japan Plus One LCD-4300U
• DisplayLink USB to DVI
• ForwardVideo EasyCAP008 USB to DVI
• HP USB 2.0 Docking Station (FQ834)
• HP USB Graphics Adapter (NL571)
• IOGEAR USB 2.0 External DVI (GUC2020)
• Koenig CMP-USBVGA10 and CMP-USBVGA11
• Lenovo 45K5296 USB to DVI
• Lenovo ThinkVision LT1421
• Lilliput UM-70
• Nanovision MiMo UM-710 and UM-740
• Rextron VCUD60 USB to DVI
• Samsung LD220
• StarTech CONV-USB2DVI
• Sunweit USB to DVI
• Unitek Y-2240 USB to DVI
• VideoHome NBdock1920
• i-tec USB 2.0 Docking Station (USBDVIDOCK)

the way this list has *range*… docking stations, tiny monitors, USB-to-DVI adapters — it's a whole ensemble cast and they all get along with the same chip family. main character energy for the DL-120 and DL-160 fr fr. 👑

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🔥 SEE ALSO 🔥

• usb(4) — yeah, it's USB. That's the whole cross-reference. Go read it, iykyk. 🫡

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⭐ HISTORY ⭐

The udl driver appeared in OpenBSD 4.6 and FreeBSD 11.0. So it's been around. It's a legacy icon. It's been through things. respect. 💅

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real talk though bestie: this page is genuinely tiny, but don't sleep on it — every single flag, file path, and device name up there is load-bearing. don't paraphrase a hardware list. ever. 😭

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and that's a wrap on this little guy! this page came to you from Debian, dated December 23, 2025 — happy reading, mwah 💖 🌈 🎀